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[SCSI] sd: update sd to use the new pm callbacks 

Update sd driver to use the callbacks defined in dev_pm_ops.

sd_freeze is NULL, the bus level callback has taken care of quiescing
the device so there should be nothing needs to be done here.
Consequently, sd_thaw is not needed here either.

suspend, poweroff and runtime suspend share the same routine sd_suspend,
which will sync flush and then stop the drive, this is the same as before.

resume, restore and runtime resume share the same routine sd_resume,
which will start the drive by putting it into active power state, this
is also the same as before.

Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Aaron Lu 2012-11-09 15:27:55 +08:00 committed by James Bottomley
parent 80d2fd48cc
commit 691e3d3175
1 changed files with 13 additions and 6 deletions
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19
drivers/scsi/sd.c
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@ -105,7 +105,7 @@ static void sd_unlock_native_capacity(struct gendisk *disk);
static int sd_probe(struct device *);
static int sd_remove(struct device *);
static void sd_shutdown(struct device *);
static int sd_suspend(struct device *, pm_message_t state);
static int sd_suspend(struct device *);
static int sd_resume(struct device *);
static void sd_rescan(struct device *);
static int sd_done(struct scsi_cmnd *);
@ -465,15 +465,23 @@ static struct class sd_disk_class = {
.dev_attrs = sd_disk_attrs,
};
static const struct dev_pm_ops sd_pm_ops = {
.suspend = sd_suspend,
.resume = sd_resume,
.poweroff = sd_suspend,
.restore = sd_resume,
.runtime_suspend = sd_suspend,
.runtime_resume = sd_resume,
};
static struct scsi_driver sd_template = {
.owner = THIS_MODULE,
.gendrv = {
.name = "sd",
.probe = sd_probe,
.remove = sd_remove,
.suspend = sd_suspend,
.resume = sd_resume,
.shutdown = sd_shutdown,
.pm = &sd_pm_ops,
},
.rescan = sd_rescan,
.done = sd_done,
@ -3054,7 +3062,7 @@ exit:
scsi_disk_put(sdkp);
}
static int sd_suspend(struct device *dev, pm_message_t mesg)
static int sd_suspend(struct device *dev)
{
struct scsi_disk *sdkp = scsi_disk_get_from_dev(dev);
int ret = 0;
@ -3069,8 +3077,7 @@ static int sd_suspend(struct device *dev, pm_message_t mesg)
goto done;
}
if (((mesg.event & PM_EVENT_SLEEP) || PMSG_IS_AUTO(mesg)) &&
sdkp->device->manage_start_stop) {
if (sdkp->device->manage_start_stop) {
sd_printk(KERN_NOTICE, sdkp, "Stopping disk\n");
ret = sd_start_stop_device(sdkp, 0);
}